[#488] Move std::hash implementation in separate file to fix clang-ti…

…dy scan bug

iceoryx2-ffi/cxx/include/iox2/waitset.hpp

@@ -230,19 +230,4 @@ class WaitSetBuilder {
     iox2_waitset_builder_h m_handle;
 };
 } // namespace iox2
-
-template <>
-struct std::hash<iox2::WaitSetAttachmentId<iox2::ServiceType::Ipc>> {
-    auto operator()(const iox2::WaitSetAttachmentId<iox2::ServiceType::Ipc>& self) -> std::size_t {
-        return self.hash();
-    }
-};
-
-template <>
-struct std::hash<iox2::WaitSetAttachmentId<iox2::ServiceType::Local>> {
-    auto operator()(const iox2::WaitSetAttachmentId<iox2::ServiceType::Local>& self) -> std::size_t {
-        return self.hash();
-    }
-};
-
 #endif

iceoryx2-ffi/cxx/include/iox2/waitset_hash.hpp

@@ -0,0 +1,32 @@
+// Copyright (c) 2024 Contributors to the Eclipse Foundation
+//
+// See the NOTICE file(s) distributed with this work for additional
+// information regarding copyright ownership.
+//
+// This program and the accompanying materials are made available under the
+// terms of the Apache Software License 2.0 which is available at
+// https://www.apache.org/licenses/LICENSE-2.0, or the MIT license
+// which is available at https://opensource.org/licenses/MIT.
+//
+// SPDX-License-Identifier: Apache-2.0 OR MIT
+
+#ifndef IOX2_WAITSET_HASH_HPP
+#define IOX2_WAITSET_HASH_HPP
+
+#include "iox2/waitset.hpp"
+
+template <>
+struct std::hash<iox2::WaitSetAttachmentId<iox2::ServiceType::Ipc>> {
+    auto operator()(const iox2::WaitSetAttachmentId<iox2::ServiceType::Ipc>& self) -> std::size_t {
+        return self.hash();
+    }
+};
+
+template <>
+struct std::hash<iox2::WaitSetAttachmentId<iox2::ServiceType::Local>> {
+    auto operator()(const iox2::WaitSetAttachmentId<iox2::ServiceType::Local>& self) -> std::size_t {
+        return self.hash();
+    }
+};
+
+#endif